15993968 has 10 divisors (see below), whose sum is σ = 30988344. Its totient is φ = 7996976.

The previous prime is 15993961. The next prime is 15993983. The reversal of 15993968 is 86939951.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15993961) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 499796 + ... + 499827.

Almost surely, 2^15993968 is an apocalyptic number.

It is an amenable number.

15993968 is a deficient number, since it is larger than the sum of its proper divisors (14994376).

15993968 is an equidigital number, since it uses as much as digits as its factorization.

15993968 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 999631 (or 999625 counting only the distinct ones).

The product of its digits is 524880, while the sum is 50.

The square root of 15993968 is about 3999.2459289221. The cubic root of 15993968 is about 251.9525399831.

It can be divided in two parts, 15993 and 968, that added together give a palindrome (16961).

The spelling of 15993968 in words is "fifteen million, nine hundred ninety-three thousand, nine hundred sixty-eight".